1366 - Incorrect integer value: '' for column `abtecsho_shop`.`whos_online`.`customer_id` at row 1

insert into whos_online (customer_id, full_name, session_id, ip_address, time_entry, time_last_click, last_page_url) values ('', 'Guest', '0el8gtfm583o9jirv2282foee5', '18.97.9.174', '1743166602', '1743166602', '/product_info.php/info/p6924_ISO-7010--Verhalten-im-Brandfall.html')

[XT SQL Error]